![Linus Torvalds](/assets/img/avatar_default.png)
Host bridge hotplug - Major overhaul of ACPI host bridge add/start (Rafael Wysocki, Yinghai Lu) - Major overhaul of PCI/ACPI binding (Rafael Wysocki, Yinghai Lu) - Split out ACPI host bridge and ACPI PCI device hotplug (Yinghai Lu) - Stop caching _PRT and make independent of bus numbers (Yinghai Lu) PCI device hotplug - Clean up cpqphp dead code (Sasha Levin) - Disable ARI unless device and upstream bridge support it (Yijing Wang) - Initialize all hot-added devices (not functions 0-7) (Yijing Wang) Power management - Don't touch ASPM if disabled (Joe Lawrence) - Fix ASPM link state management (Myron Stowe) Miscellaneous - Fix PCI_EXP_FLAGS accessor (Alex Williamson) - Disable Bus Master in pci_device_shutdown (Konstantin Khlebnikov) - Document hotplug resource and MPS parameters (Yijing Wang) - Add accessor for PCIe capabilities (Myron Stowe) - Drop pciehp suspend/resume messages (Paul Bolle) - Make pci_slot built-in only (not a module) (Jiang Liu) - Remove unused PCI/ACPI bind ops (Jiang Liu) - Removed used pci_root_bus (Bjorn Helgaas) -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAABAgAGBQJRKS3hAAoJEFmIoMA60/r8xxoP/j1CS4oCZAnBIVT9fKBkis+/ CENcfHIUKj6J9iMfJEVvqBELvqaLqtpeNwAGMcGPxV7VuT3K1QumChfaTpRDP0HC VDRmrjcmfenEK+YPOG7acsrTyqk2wjpLOyu9MKRxtC5u7tF6376KQpkEFpO4haL4 eUHTxfE76OkrPBSvx3+PUSf6jqrvrNbjX8K6HdDVVlm3sVAQKmYJU/Wphv2NPOqa CAMyCzEGybFjr8hDRwvWgr+06c718GMwQUbnrPdHXAe7lMNMrN/XVBmU9ABN3Aas icd3lrDs+yPObgcO/gT8+sAZErCtdJ9zuHGYHdYpRbIQj/5JT4TMk7tw/Bj7vKY9 Mqmho9GR5YmYTRN9f1r+2n5AQ/KYWXJDrRNOnt5/ys5BOM3vwJ7WJ902zpSwtFQp nLX+oD/hLfzpnoIQGDuBAoAXp2Kam3XWRgVvG78buRNrPj+kUzimk14a8qQeY+CB El6UKuwi5Uv/qgs1gAqqjmZmsAkon2DnsRZa6Fl8NTkDlis7LY4gp9OU38ySFpB+ PhCmRyCZmDDqTVtwj6XzR3nPQ5LBSbvsTfgMxYMIUSXHa06tyb2q5p4mEIas0OmU RKaP5xQqZuTgD8fbdYrx0xgSrn7JHt/j/X//Qs6unlLCWhlpm3LjJZKxyw2FwBGr o4Lci+PiBh3MowCrju9D =ER3b -----END PGP SIGNATURE----- Merge tag 'pci-v3.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull PCI changes from Bjorn Helgaas: "Host bridge hotplug - Major overhaul of ACPI host bridge add/start (Rafael Wysocki, Yinghai Lu) - Major overhaul of PCI/ACPI binding (Rafael Wysocki, Yinghai Lu) - Split out ACPI host bridge and ACPI PCI device hotplug (Yinghai Lu) - Stop caching _PRT and make independent of bus numbers (Yinghai Lu) PCI device hotplug - Clean up cpqphp dead code (Sasha Levin) - Disable ARI unless device and upstream bridge support it (Yijing Wang) - Initialize all hot-added devices (not functions 0-7) (Yijing Wang) Power management - Don't touch ASPM if disabled (Joe Lawrence) - Fix ASPM link state management (Myron Stowe) Miscellaneous - Fix PCI_EXP_FLAGS accessor (Alex Williamson) - Disable Bus Master in pci_device_shutdown (Konstantin Khlebnikov) - Document hotplug resource and MPS parameters (Yijing Wang) - Add accessor for PCIe capabilities (Myron Stowe) - Drop pciehp suspend/resume messages (Paul Bolle) - Make pci_slot built-in only (not a module) (Jiang Liu) - Remove unused PCI/ACPI bind ops (Jiang Liu) - Removed used pci_root_bus (Bjorn Helgaas)" * tag 'pci-v3.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (51 commits) PCI/ACPI: Don't cache _PRT, and don't associate them with bus numbers PCI: Fix PCI Express Capability accessors for PCI_EXP_FLAGS ACPI / PCI: Make pci_slot built-in only, not a module PCI/PM: Clear state_saved during suspend PCI: Use atomic_inc_return() rather than atomic_add_return() PCI: Catch attempts to disable already-disabled devices PCI: Disable Bus Master unconditionally in pci_device_shutdown() PCI: acpiphp: Remove dead code for PCI host bridge hotplug PCI: acpiphp: Create companion ACPI devices before creating PCI devices PCI: Remove unused "rc" in virtfn_add_bus() PCI: pciehp: Drop suspend/resume ENTRY messages PCI/ASPM: Don't touch ASPM if forcibly disabled PCI/ASPM: Deallocate upstream link state even if device is not PCIe PCI: Document MPS parameters pci=pcie_bus_safe, pci=pcie_bus_perf, etc PCI: Document hpiosize= and hpmemsize= resource reservation parameters PCI: Use PCI Express Capability accessor PCI: Introduce accessor to retrieve PCIe Capabilities Register PCI: Put pci_dev in device tree as early as possible PCI: Skip attaching driver in device_add() PCI: acpiphp: Keep driver loaded even if no slots found ...
768 lines
17 KiB
C
768 lines
17 KiB
C
/*
|
|
* Low-Level PCI Support for PC
|
|
*
|
|
* (c) 1999--2000 Martin Mares <mj@ucw.cz>
|
|
*/
|
|
|
|
#include <linux/sched.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/init.h>
|
|
#include <linux/dmi.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <asm-generic/pci-bridge.h>
|
|
#include <asm/acpi.h>
|
|
#include <asm/segment.h>
|
|
#include <asm/io.h>
|
|
#include <asm/smp.h>
|
|
#include <asm/pci_x86.h>
|
|
#include <asm/setup.h>
|
|
|
|
unsigned int pci_probe = PCI_PROBE_BIOS | PCI_PROBE_CONF1 | PCI_PROBE_CONF2 |
|
|
PCI_PROBE_MMCONF;
|
|
|
|
unsigned int pci_early_dump_regs;
|
|
static int pci_bf_sort;
|
|
static int smbios_type_b1_flag;
|
|
int pci_routeirq;
|
|
int noioapicquirk;
|
|
#ifdef CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS
|
|
int noioapicreroute = 0;
|
|
#else
|
|
int noioapicreroute = 1;
|
|
#endif
|
|
int pcibios_last_bus = -1;
|
|
unsigned long pirq_table_addr;
|
|
const struct pci_raw_ops *__read_mostly raw_pci_ops;
|
|
const struct pci_raw_ops *__read_mostly raw_pci_ext_ops;
|
|
|
|
int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
|
|
int reg, int len, u32 *val)
|
|
{
|
|
if (domain == 0 && reg < 256 && raw_pci_ops)
|
|
return raw_pci_ops->read(domain, bus, devfn, reg, len, val);
|
|
if (raw_pci_ext_ops)
|
|
return raw_pci_ext_ops->read(domain, bus, devfn, reg, len, val);
|
|
return -EINVAL;
|
|
}
|
|
|
|
int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
|
|
int reg, int len, u32 val)
|
|
{
|
|
if (domain == 0 && reg < 256 && raw_pci_ops)
|
|
return raw_pci_ops->write(domain, bus, devfn, reg, len, val);
|
|
if (raw_pci_ext_ops)
|
|
return raw_pci_ext_ops->write(domain, bus, devfn, reg, len, val);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int pci_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value)
|
|
{
|
|
return raw_pci_read(pci_domain_nr(bus), bus->number,
|
|
devfn, where, size, value);
|
|
}
|
|
|
|
static int pci_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value)
|
|
{
|
|
return raw_pci_write(pci_domain_nr(bus), bus->number,
|
|
devfn, where, size, value);
|
|
}
|
|
|
|
struct pci_ops pci_root_ops = {
|
|
.read = pci_read,
|
|
.write = pci_write,
|
|
};
|
|
|
|
/*
|
|
* This interrupt-safe spinlock protects all accesses to PCI
|
|
* configuration space.
|
|
*/
|
|
DEFINE_RAW_SPINLOCK(pci_config_lock);
|
|
|
|
static int can_skip_ioresource_align(const struct dmi_system_id *d)
|
|
{
|
|
pci_probe |= PCI_CAN_SKIP_ISA_ALIGN;
|
|
printk(KERN_INFO "PCI: %s detected, can skip ISA alignment\n", d->ident);
|
|
return 0;
|
|
}
|
|
|
|
static const struct dmi_system_id can_skip_pciprobe_dmi_table[] = {
|
|
/*
|
|
* Systems where PCI IO resource ISA alignment can be skipped
|
|
* when the ISA enable bit in the bridge control is not set
|
|
*/
|
|
{
|
|
.callback = can_skip_ioresource_align,
|
|
.ident = "IBM System x3800",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
|
|
},
|
|
},
|
|
{
|
|
.callback = can_skip_ioresource_align,
|
|
.ident = "IBM System x3850",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "x3850"),
|
|
},
|
|
},
|
|
{
|
|
.callback = can_skip_ioresource_align,
|
|
.ident = "IBM System x3950",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "x3950"),
|
|
},
|
|
},
|
|
{}
|
|
};
|
|
|
|
void __init dmi_check_skip_isa_align(void)
|
|
{
|
|
dmi_check_system(can_skip_pciprobe_dmi_table);
|
|
}
|
|
|
|
static void pcibios_fixup_device_resources(struct pci_dev *dev)
|
|
{
|
|
struct resource *rom_r = &dev->resource[PCI_ROM_RESOURCE];
|
|
struct resource *bar_r;
|
|
int bar;
|
|
|
|
if (pci_probe & PCI_NOASSIGN_BARS) {
|
|
/*
|
|
* If the BIOS did not assign the BAR, zero out the
|
|
* resource so the kernel doesn't attmept to assign
|
|
* it later on in pci_assign_unassigned_resources
|
|
*/
|
|
for (bar = 0; bar <= PCI_STD_RESOURCE_END; bar++) {
|
|
bar_r = &dev->resource[bar];
|
|
if (bar_r->start == 0 && bar_r->end != 0) {
|
|
bar_r->flags = 0;
|
|
bar_r->end = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (pci_probe & PCI_NOASSIGN_ROMS) {
|
|
if (rom_r->parent)
|
|
return;
|
|
if (rom_r->start) {
|
|
/* we deal with BIOS assigned ROM later */
|
|
return;
|
|
}
|
|
rom_r->start = rom_r->end = rom_r->flags = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Called after each bus is probed, but before its children
|
|
* are examined.
|
|
*/
|
|
|
|
void pcibios_fixup_bus(struct pci_bus *b)
|
|
{
|
|
struct pci_dev *dev;
|
|
|
|
pci_read_bridge_bases(b);
|
|
list_for_each_entry(dev, &b->devices, bus_list)
|
|
pcibios_fixup_device_resources(dev);
|
|
}
|
|
|
|
/*
|
|
* Only use DMI information to set this if nothing was passed
|
|
* on the kernel command line (which was parsed earlier).
|
|
*/
|
|
|
|
static int set_bf_sort(const struct dmi_system_id *d)
|
|
{
|
|
if (pci_bf_sort == pci_bf_sort_default) {
|
|
pci_bf_sort = pci_dmi_bf;
|
|
printk(KERN_INFO "PCI: %s detected, enabling pci=bfsort.\n", d->ident);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void read_dmi_type_b1(const struct dmi_header *dm,
|
|
void *private_data)
|
|
{
|
|
u8 *d = (u8 *)dm + 4;
|
|
|
|
if (dm->type != 0xB1)
|
|
return;
|
|
switch (((*(u32 *)d) >> 9) & 0x03) {
|
|
case 0x00:
|
|
printk(KERN_INFO "dmi type 0xB1 record - unknown flag\n");
|
|
break;
|
|
case 0x01: /* set pci=bfsort */
|
|
smbios_type_b1_flag = 1;
|
|
break;
|
|
case 0x02: /* do not set pci=bfsort */
|
|
smbios_type_b1_flag = 2;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int find_sort_method(const struct dmi_system_id *d)
|
|
{
|
|
dmi_walk(read_dmi_type_b1, NULL);
|
|
|
|
if (smbios_type_b1_flag == 1) {
|
|
set_bf_sort(d);
|
|
return 0;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Enable renumbering of PCI bus# ranges to reach all PCI busses (Cardbus)
|
|
*/
|
|
#ifdef __i386__
|
|
static int assign_all_busses(const struct dmi_system_id *d)
|
|
{
|
|
pci_probe |= PCI_ASSIGN_ALL_BUSSES;
|
|
printk(KERN_INFO "%s detected: enabling PCI bus# renumbering"
|
|
" (pci=assign-busses)\n", d->ident);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int set_scan_all(const struct dmi_system_id *d)
|
|
{
|
|
printk(KERN_INFO "PCI: %s detected, enabling pci=pcie_scan_all\n",
|
|
d->ident);
|
|
pci_add_flags(PCI_SCAN_ALL_PCIE_DEVS);
|
|
return 0;
|
|
}
|
|
|
|
static const struct dmi_system_id pciprobe_dmi_table[] = {
|
|
#ifdef __i386__
|
|
/*
|
|
* Laptops which need pci=assign-busses to see Cardbus cards
|
|
*/
|
|
{
|
|
.callback = assign_all_busses,
|
|
.ident = "Samsung X20 Laptop",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Samsung Electronics"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "SX20S"),
|
|
},
|
|
},
|
|
#endif /* __i386__ */
|
|
{
|
|
.callback = set_bf_sort,
|
|
.ident = "Dell PowerEdge 1950",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1950"),
|
|
},
|
|
},
|
|
{
|
|
.callback = set_bf_sort,
|
|
.ident = "Dell PowerEdge 1955",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1955"),
|
|
},
|
|
},
|
|
{
|
|
.callback = set_bf_sort,
|
|
.ident = "Dell PowerEdge 2900",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2900"),
|
|
},
|
|
},
|
|
{
|
|
.callback = set_bf_sort,
|
|
.ident = "Dell PowerEdge 2950",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2950"),
|
|
},
|
|
},
|
|
{
|
|
.callback = set_bf_sort,
|
|
.ident = "Dell PowerEdge R900",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge R900"),
|
|
},
|
|
},
|
|
{
|
|
.callback = find_sort_method,
|
|
.ident = "Dell System",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc"),
|
|
},
|
|
},
|
|
{
|
|
.callback = set_bf_sort,
|
|
.ident = "HP ProLiant BL20p G3",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "HP"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL20p G3"),
|
|
},
|
|
},
|
|
{
|
|
.callback = set_bf_sort,
|
|
.ident = "HP ProLiant BL20p G4",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "HP"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL20p G4"),
|
|
},
|
|
},
|
|
{
|
|
.callback = set_bf_sort,
|
|
.ident = "HP ProLiant BL30p G1",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "HP"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL30p G1"),
|
|
},
|
|
},
|
|
{
|
|
.callback = set_bf_sort,
|
|
.ident = "HP ProLiant BL25p G1",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "HP"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL25p G1"),
|
|
},
|
|
},
|
|
{
|
|
.callback = set_bf_sort,
|
|
.ident = "HP ProLiant BL35p G1",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "HP"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL35p G1"),
|
|
},
|
|
},
|
|
{
|
|
.callback = set_bf_sort,
|
|
.ident = "HP ProLiant BL45p G1",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "HP"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL45p G1"),
|
|
},
|
|
},
|
|
{
|
|
.callback = set_bf_sort,
|
|
.ident = "HP ProLiant BL45p G2",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "HP"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL45p G2"),
|
|
},
|
|
},
|
|
{
|
|
.callback = set_bf_sort,
|
|
.ident = "HP ProLiant BL460c G1",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "HP"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL460c G1"),
|
|
},
|
|
},
|
|
{
|
|
.callback = set_bf_sort,
|
|
.ident = "HP ProLiant BL465c G1",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "HP"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL465c G1"),
|
|
},
|
|
},
|
|
{
|
|
.callback = set_bf_sort,
|
|
.ident = "HP ProLiant BL480c G1",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "HP"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL480c G1"),
|
|
},
|
|
},
|
|
{
|
|
.callback = set_bf_sort,
|
|
.ident = "HP ProLiant BL685c G1",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "HP"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant BL685c G1"),
|
|
},
|
|
},
|
|
{
|
|
.callback = set_bf_sort,
|
|
.ident = "HP ProLiant DL360",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "HP"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL360"),
|
|
},
|
|
},
|
|
{
|
|
.callback = set_bf_sort,
|
|
.ident = "HP ProLiant DL380",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "HP"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL380"),
|
|
},
|
|
},
|
|
#ifdef __i386__
|
|
{
|
|
.callback = assign_all_busses,
|
|
.ident = "Compaq EVO N800c",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "EVO N800c"),
|
|
},
|
|
},
|
|
#endif
|
|
{
|
|
.callback = set_bf_sort,
|
|
.ident = "HP ProLiant DL385 G2",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "HP"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL385 G2"),
|
|
},
|
|
},
|
|
{
|
|
.callback = set_bf_sort,
|
|
.ident = "HP ProLiant DL585 G2",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "HP"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL585 G2"),
|
|
},
|
|
},
|
|
{
|
|
.callback = set_scan_all,
|
|
.ident = "Stratus/NEC ftServer",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Stratus"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "ftServer"),
|
|
},
|
|
},
|
|
{}
|
|
};
|
|
|
|
void __init dmi_check_pciprobe(void)
|
|
{
|
|
dmi_check_system(pciprobe_dmi_table);
|
|
}
|
|
|
|
struct pci_bus *pcibios_scan_root(int busnum)
|
|
{
|
|
struct pci_bus *bus = NULL;
|
|
|
|
while ((bus = pci_find_next_bus(bus)) != NULL) {
|
|
if (bus->number == busnum) {
|
|
/* Already scanned */
|
|
return bus;
|
|
}
|
|
}
|
|
|
|
return pci_scan_bus_on_node(busnum, &pci_root_ops,
|
|
get_mp_bus_to_node(busnum));
|
|
}
|
|
|
|
void __init pcibios_set_cache_line_size(void)
|
|
{
|
|
struct cpuinfo_x86 *c = &boot_cpu_data;
|
|
|
|
/*
|
|
* Set PCI cacheline size to that of the CPU if the CPU has reported it.
|
|
* (For older CPUs that don't support cpuid, we se it to 32 bytes
|
|
* It's also good for 386/486s (which actually have 16)
|
|
* as quite a few PCI devices do not support smaller values.
|
|
*/
|
|
if (c->x86_clflush_size > 0) {
|
|
pci_dfl_cache_line_size = c->x86_clflush_size >> 2;
|
|
printk(KERN_DEBUG "PCI: pci_cache_line_size set to %d bytes\n",
|
|
pci_dfl_cache_line_size << 2);
|
|
} else {
|
|
pci_dfl_cache_line_size = 32 >> 2;
|
|
printk(KERN_DEBUG "PCI: Unknown cacheline size. Setting to 32 bytes\n");
|
|
}
|
|
}
|
|
|
|
int __init pcibios_init(void)
|
|
{
|
|
if (!raw_pci_ops) {
|
|
printk(KERN_WARNING "PCI: System does not support PCI\n");
|
|
return 0;
|
|
}
|
|
|
|
pcibios_set_cache_line_size();
|
|
pcibios_resource_survey();
|
|
|
|
if (pci_bf_sort >= pci_force_bf)
|
|
pci_sort_breadthfirst();
|
|
return 0;
|
|
}
|
|
|
|
char * __init pcibios_setup(char *str)
|
|
{
|
|
if (!strcmp(str, "off")) {
|
|
pci_probe = 0;
|
|
return NULL;
|
|
} else if (!strcmp(str, "bfsort")) {
|
|
pci_bf_sort = pci_force_bf;
|
|
return NULL;
|
|
} else if (!strcmp(str, "nobfsort")) {
|
|
pci_bf_sort = pci_force_nobf;
|
|
return NULL;
|
|
}
|
|
#ifdef CONFIG_PCI_BIOS
|
|
else if (!strcmp(str, "bios")) {
|
|
pci_probe = PCI_PROBE_BIOS;
|
|
return NULL;
|
|
} else if (!strcmp(str, "nobios")) {
|
|
pci_probe &= ~PCI_PROBE_BIOS;
|
|
return NULL;
|
|
} else if (!strcmp(str, "biosirq")) {
|
|
pci_probe |= PCI_BIOS_IRQ_SCAN;
|
|
return NULL;
|
|
} else if (!strncmp(str, "pirqaddr=", 9)) {
|
|
pirq_table_addr = simple_strtoul(str+9, NULL, 0);
|
|
return NULL;
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_PCI_DIRECT
|
|
else if (!strcmp(str, "conf1")) {
|
|
pci_probe = PCI_PROBE_CONF1 | PCI_NO_CHECKS;
|
|
return NULL;
|
|
}
|
|
else if (!strcmp(str, "conf2")) {
|
|
pci_probe = PCI_PROBE_CONF2 | PCI_NO_CHECKS;
|
|
return NULL;
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_PCI_MMCONFIG
|
|
else if (!strcmp(str, "nommconf")) {
|
|
pci_probe &= ~PCI_PROBE_MMCONF;
|
|
return NULL;
|
|
}
|
|
else if (!strcmp(str, "check_enable_amd_mmconf")) {
|
|
pci_probe |= PCI_CHECK_ENABLE_AMD_MMCONF;
|
|
return NULL;
|
|
}
|
|
#endif
|
|
else if (!strcmp(str, "noacpi")) {
|
|
acpi_noirq_set();
|
|
return NULL;
|
|
}
|
|
else if (!strcmp(str, "noearly")) {
|
|
pci_probe |= PCI_PROBE_NOEARLY;
|
|
return NULL;
|
|
}
|
|
#ifndef CONFIG_X86_VISWS
|
|
else if (!strcmp(str, "usepirqmask")) {
|
|
pci_probe |= PCI_USE_PIRQ_MASK;
|
|
return NULL;
|
|
} else if (!strncmp(str, "irqmask=", 8)) {
|
|
pcibios_irq_mask = simple_strtol(str+8, NULL, 0);
|
|
return NULL;
|
|
} else if (!strncmp(str, "lastbus=", 8)) {
|
|
pcibios_last_bus = simple_strtol(str+8, NULL, 0);
|
|
return NULL;
|
|
}
|
|
#endif
|
|
else if (!strcmp(str, "rom")) {
|
|
pci_probe |= PCI_ASSIGN_ROMS;
|
|
return NULL;
|
|
} else if (!strcmp(str, "norom")) {
|
|
pci_probe |= PCI_NOASSIGN_ROMS;
|
|
return NULL;
|
|
} else if (!strcmp(str, "nobar")) {
|
|
pci_probe |= PCI_NOASSIGN_BARS;
|
|
return NULL;
|
|
} else if (!strcmp(str, "assign-busses")) {
|
|
pci_probe |= PCI_ASSIGN_ALL_BUSSES;
|
|
return NULL;
|
|
} else if (!strcmp(str, "use_crs")) {
|
|
pci_probe |= PCI_USE__CRS;
|
|
return NULL;
|
|
} else if (!strcmp(str, "nocrs")) {
|
|
pci_probe |= PCI_ROOT_NO_CRS;
|
|
return NULL;
|
|
} else if (!strcmp(str, "earlydump")) {
|
|
pci_early_dump_regs = 1;
|
|
return NULL;
|
|
} else if (!strcmp(str, "routeirq")) {
|
|
pci_routeirq = 1;
|
|
return NULL;
|
|
} else if (!strcmp(str, "skip_isa_align")) {
|
|
pci_probe |= PCI_CAN_SKIP_ISA_ALIGN;
|
|
return NULL;
|
|
} else if (!strcmp(str, "noioapicquirk")) {
|
|
noioapicquirk = 1;
|
|
return NULL;
|
|
} else if (!strcmp(str, "ioapicreroute")) {
|
|
if (noioapicreroute != -1)
|
|
noioapicreroute = 0;
|
|
return NULL;
|
|
} else if (!strcmp(str, "noioapicreroute")) {
|
|
if (noioapicreroute != -1)
|
|
noioapicreroute = 1;
|
|
return NULL;
|
|
}
|
|
return str;
|
|
}
|
|
|
|
unsigned int pcibios_assign_all_busses(void)
|
|
{
|
|
return (pci_probe & PCI_ASSIGN_ALL_BUSSES) ? 1 : 0;
|
|
}
|
|
|
|
int pcibios_add_device(struct pci_dev *dev)
|
|
{
|
|
struct setup_data *data;
|
|
struct pci_setup_rom *rom;
|
|
u64 pa_data;
|
|
|
|
pa_data = boot_params.hdr.setup_data;
|
|
while (pa_data) {
|
|
data = phys_to_virt(pa_data);
|
|
|
|
if (data->type == SETUP_PCI) {
|
|
rom = (struct pci_setup_rom *)data;
|
|
|
|
if ((pci_domain_nr(dev->bus) == rom->segment) &&
|
|
(dev->bus->number == rom->bus) &&
|
|
(PCI_SLOT(dev->devfn) == rom->device) &&
|
|
(PCI_FUNC(dev->devfn) == rom->function) &&
|
|
(dev->vendor == rom->vendor) &&
|
|
(dev->device == rom->devid)) {
|
|
dev->rom = pa_data +
|
|
offsetof(struct pci_setup_rom, romdata);
|
|
dev->romlen = rom->pcilen;
|
|
}
|
|
}
|
|
pa_data = data->next;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int pcibios_enable_device(struct pci_dev *dev, int mask)
|
|
{
|
|
int err;
|
|
|
|
if ((err = pci_enable_resources(dev, mask)) < 0)
|
|
return err;
|
|
|
|
if (!pci_dev_msi_enabled(dev))
|
|
return pcibios_enable_irq(dev);
|
|
return 0;
|
|
}
|
|
|
|
void pcibios_disable_device (struct pci_dev *dev)
|
|
{
|
|
if (!pci_dev_msi_enabled(dev) && pcibios_disable_irq)
|
|
pcibios_disable_irq(dev);
|
|
}
|
|
|
|
int pci_ext_cfg_avail(void)
|
|
{
|
|
if (raw_pci_ext_ops)
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
struct pci_bus *pci_scan_bus_on_node(int busno, struct pci_ops *ops, int node)
|
|
{
|
|
LIST_HEAD(resources);
|
|
struct pci_bus *bus = NULL;
|
|
struct pci_sysdata *sd;
|
|
|
|
/*
|
|
* Allocate per-root-bus (not per bus) arch-specific data.
|
|
* TODO: leak; this memory is never freed.
|
|
* It's arguable whether it's worth the trouble to care.
|
|
*/
|
|
sd = kzalloc(sizeof(*sd), GFP_KERNEL);
|
|
if (!sd) {
|
|
printk(KERN_ERR "PCI: OOM, skipping PCI bus %02x\n", busno);
|
|
return NULL;
|
|
}
|
|
sd->node = node;
|
|
x86_pci_root_bus_resources(busno, &resources);
|
|
printk(KERN_DEBUG "PCI: Probing PCI hardware (bus %02x)\n", busno);
|
|
bus = pci_scan_root_bus(NULL, busno, ops, sd, &resources);
|
|
if (!bus) {
|
|
pci_free_resource_list(&resources);
|
|
kfree(sd);
|
|
}
|
|
|
|
return bus;
|
|
}
|
|
|
|
struct pci_bus *pci_scan_bus_with_sysdata(int busno)
|
|
{
|
|
return pci_scan_bus_on_node(busno, &pci_root_ops, -1);
|
|
}
|
|
|
|
/*
|
|
* NUMA info for PCI busses
|
|
*
|
|
* Early arch code is responsible for filling in reasonable values here.
|
|
* A node id of "-1" means "use current node". In other words, if a bus
|
|
* has a -1 node id, it's not tightly coupled to any particular chunk
|
|
* of memory (as is the case on some Nehalem systems).
|
|
*/
|
|
#ifdef CONFIG_NUMA
|
|
|
|
#define BUS_NR 256
|
|
|
|
#ifdef CONFIG_X86_64
|
|
|
|
static int mp_bus_to_node[BUS_NR] = {
|
|
[0 ... BUS_NR - 1] = -1
|
|
};
|
|
|
|
void set_mp_bus_to_node(int busnum, int node)
|
|
{
|
|
if (busnum >= 0 && busnum < BUS_NR)
|
|
mp_bus_to_node[busnum] = node;
|
|
}
|
|
|
|
int get_mp_bus_to_node(int busnum)
|
|
{
|
|
int node = -1;
|
|
|
|
if (busnum < 0 || busnum > (BUS_NR - 1))
|
|
return node;
|
|
|
|
node = mp_bus_to_node[busnum];
|
|
|
|
/*
|
|
* let numa_node_id to decide it later in dma_alloc_pages
|
|
* if there is no ram on that node
|
|
*/
|
|
if (node != -1 && !node_online(node))
|
|
node = -1;
|
|
|
|
return node;
|
|
}
|
|
|
|
#else /* CONFIG_X86_32 */
|
|
|
|
static int mp_bus_to_node[BUS_NR] = {
|
|
[0 ... BUS_NR - 1] = -1
|
|
};
|
|
|
|
void set_mp_bus_to_node(int busnum, int node)
|
|
{
|
|
if (busnum >= 0 && busnum < BUS_NR)
|
|
mp_bus_to_node[busnum] = (unsigned char) node;
|
|
}
|
|
|
|
int get_mp_bus_to_node(int busnum)
|
|
{
|
|
int node;
|
|
|
|
if (busnum < 0 || busnum > (BUS_NR - 1))
|
|
return 0;
|
|
node = mp_bus_to_node[busnum];
|
|
return node;
|
|
}
|
|
|
|
#endif /* CONFIG_X86_32 */
|
|
|
|
#endif /* CONFIG_NUMA */
|